Ounces count when you're fighting gravity -- in your pack, on your body, and especially on your feet.

The Salomon SpeedCross 2 (left) and adidas Response Trail 14 are my two lightest trail running shoes. My Response Trail 14's weigh 24.2 oz./pair (US 9.5), and the SpeedCross 2's weigh 21.3 oz./pair (US 9.0).

Wow -- what a great ride! That was my impression the first time I used the Salomon XT Wings trail running shoes. That continues to be my feeling after using the shoe for a couple of weeks and doing several runs in the 15-20 mile range. For my particular trail running requirements, this shoe has a near perfect balance of comfort, smooth ride, cushioning, traction and support.

Update 9/10/07. Shortly after writing this post I learned that the GH-615B has been discontinued in the U.S. in favor of the GH-615M, which includes a heart rate monitor.

When my Forerunner 205 had to be returned to Garmin a second time, it seemed like a good time to see if there were any new GPS-based running watches I could use for tracing the routes of my trail runs. The description of the GH615B on the GlobalSat web site looked promising. Like the Forerunner 205/305 it had a watch-like design, and the specs said it also used the newer, more sensitive, SiRFstarIII GPS technology.

The Strawberry - Bear Canyon loop trail run is a longer, more adventurous variation of the circuit around Strawberry Peak described in the post Spring Growth.

Updated Wednesday, July 11, 2007.

The Goggle Earth image above shows two GPS traces. Here's a larger image. The red trace was created using a Garmin Forerunner 201, and the yellow trace was created with a Forerunner 205. The course is comprised of a mix of fire roads and trails, through a variety of terrain and cover. The better tracking of the Forerunner 205 is clearly evident. Here is another view of the same course with the two traces.

I've had my Forerunner 205 since March 2006, and in my experience, it is a huge improvement over the 201:

• It is more compact and less obtrusive.
• Tracks are more accurate, and it almost never loses reception.
• It accepts routes for sequential navigation.
• Uploading and downloading data is easier and faster with the USB interface.
• The GPS chipset firmware (as well as unit firmware) can be updated.
• It has multiple customizable data screens that are easily displayed during a run.

The performance of the GPS receiver in the Forerunner 205 continues to amaze me. It is tenacious. I was wearing the Forerunner 205 when I got caught in a fierce thunderstorm running in the Mt. Pinos area in July. Even in the middle of a thunderstorm, on a north facing slope, in a fir and pine forest, the unit did not lose reception. Here's a Forerunner 205 trace of the run, exported from TOPO! Note that the traces going out and coming back very nearly overlay each other. The only exception is a real deviation between Sawmill Mountain and Mt. Pinos where I wandered off the trail to a minor summit. Also note that the trail is incorrectly marked on the topo map in the vicinity of Grouse Mountain.

In my experience there are some cons:

As mentioned in the post North Backbone Trail Revisited, in early October 2006, I had a problem with not being able to power on my 205 after it was charged. Garmin promptly replaced the unit, under warranty, without charge.

In June 2007 the replaced unit began to experience an intermittent issue where it would suddenly start to rapidly cycle through display screens, beep, and not respond to key presses. The only way to stop it was pressing the power + mode + reset keys. Garmin promptly replaced the unit, but charged a flat rate $79 repair fee. Oddly, when the unit was returned, the history included a few runs from the London, Ontario (Canada) area from late February and early March 2007.

The interface contacts on the back of the Forerunner 205 tends to get corroded from sweat. This can cause problems with the USB connection and transferring data. I clean the contacts from time to time with a pencil eraser.

In my opinion the Training Center Software is still poor, and for that reason I continue to use SportTracks.

Note: The course is the run from the end of Reseda Blvd to Trippet Ranch described in the post Musch Trail Mule Deer.

There are three basic choices for running hydration: hand bottles, a waist pack, or a back pack. There are also various combinations of these basic themes. If you do much off-road running, chances are good you have at least one version from each category. Until recently I had not tried any of the waist packs with a horizontally oriented bottle. Why not?

Many runners are fanatical about their shoes. Trail runners are no different, and every runner has their favorite. For several years my favorite trail running shoe has been the Montrail Vitesse. This is a shoe that straight out of the box, I would not hesitate to wear in a 50K. I've tried several of the newer Montrail designs, but none performed as well for me as the Vitesse. That is, until I tried the Continental Divide.

Update 01/15/08. My latest pair of Vitesse's (made in China) seem to be a very different shoe than the dozens of pairs in which I've run before. They seemed to be short for the size, a little more narrow in the forefoot, and the cushioning and shock absorption didn't feel up to par. Montrail was purchased by Columbia Sportswear about a year and a half ago and according to a customer service rep, "manufacturing of the shoes moved to new factories." An ultrarunning friend had a similar sizing problem with his last order of two pairs of Vitesses, but said the cushioning was OK. Maybe my latest pair was an aberration. I hope so.

Update 08/19/07. Each of my last two pairs of Continental Divides have weighed more than the first pair. The second weighed 30.6 oz./pair, and the third weighed 32.0 oz./pair! My last two pairs of Vitesses have weighed in at 27.0 oz./pair. At only 24.2 oz./pair, the adidas Trail Response 14 is my most lightweight trail running shoe.